Medical cannabis in the UK requires a specialist prescription, not a card....

https://www.rankbookmarkings.win/confused-about-accessing-medical-cannabis-in-the-uk-forget-the-cards-you-see

Medical cannabis in the UK requires a specialist prescription, not a card. Private clinics handle these appointments, not the NHS. You need your medical records ready. Always research travel laws before you leave. Learn how to stay legal and secure.